I'm on PS4 North America server.
The quest Striking At The Heart is unfinishable. I started it & got to the point where I need to get the keystones, but they aren't in the pedestals. However the game shows an icon above the pedestals indicating that I need to pick them up. I've tried leaving the area numerous times, I've restarted my application & it still doesn't work... To top it off, I'm now permanently stuck in the shadow realm or whatever it's called...